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mfd: max77620: Convert poweroff support to sys-off API

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Convert max77620_pm_power_off() to the sys-off callback prototype and
register it with the sys-off API when the device tree marks the PMIC as
a system power controller. This also removes the global max77620_scratch
pointer by passing the chip instance through the callback data.

This modernizes the driver's poweroff handling and aligns it with
the kernel sys-off infrastructure.

Signed-off-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
Link: https://patch.msgid.link/20260514-smaug-poweroff-v1-2-30f9a4688966@tecnico.ulisboa.pt
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Diogo Ivo
2026-05-14 16:47:20 +02:00
committed by Lee Jones
parent 7502c035b8
commit f01e402beb
1 changed files with 13 additions and 9 deletions
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22
drivers/mfd/max77620.c
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@@ -31,11 +31,10 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
#include <linux/slab.h>
static struct max77620_chip *max77620_scratch;
static const struct resource gpio_resources[] = {
DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO),
};
@@ -484,13 +483,15 @@ static int max77620_read_es_version(struct max77620_chip *chip)
return ret;
}
static void max77620_pm_power_off(void)
static int max77620_pm_power_off(struct sys_off_data *data)
{
struct max77620_chip *chip = max77620_scratch;
struct max77620_chip *chip = data->cb_data;
regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1,
MAX77620_ONOFFCNFG1_SFT_RST,
MAX77620_ONOFFCNFG1_SFT_RST);
return NOTIFY_DONE;
}
static int max77620_probe(struct i2c_client *client)
@@ -501,7 +502,6 @@ static int max77620_probe(struct i2c_client *client)
struct regmap_irq_chip *chip_desc;
const struct mfd_cell *mfd_cells;
int n_mfd_cells;
bool pm_off;
int ret;
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
@@ -573,10 +573,14 @@ static int max77620_probe(struct i2c_client *client)
return ret;
}
pm_off = of_device_is_system_power_controller(client->dev.of_node);
if (pm_off && !pm_power_off) {
max77620_scratch = chip;
pm_power_off = max77620_pm_power_off;
if (of_device_is_system_power_controller(client->dev.of_node)) {
ret = devm_register_sys_off_handler(&client->dev,
SYS_OFF_MODE_POWER_OFF,
SYS_OFF_PRIO_DEFAULT,
max77620_pm_power_off, chip);
if (ret)
return dev_err_probe(&client->dev, ret,
"failed to register power-off handler\n");
}
return 0;